Malicious PDF — malware analysis report

Static analysis result for SHA-256 296c2ff72c4f1d11…

MALICIOUS

PDF

78.3 KB Created: 2021-09-16 16:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c5e7b712887df6cfc741c05500c679ca SHA-1: 081c8f4a8e0cc82defa3ee53d5af95447fd686c6 SHA-256: 296c2ff72c4f1d117e5b674d38ecace9b4fd34316960c3d31b634459414dd672
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to a link farm, indicating a likely attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic for distributing malware or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://sitoad.com/bbqjoekey/files/202109030529185977.pdf In PDF document text
    • http://rockpapersun.com/upload_mce_image/file/tosenegowexirelugam.pdfIn PDF document text
    • https://orig-shop-gsm.ro/ckfinder/userfiles/files/67601141682.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/80966714310.pdfIn PDF document text
    • https://cosmopolitanhotel.lastrada.bg/uploads/wysiwyg/files/11460650548.pdfIn PDF document text
    • http://ed-union05.ru/files/file/32495690791.pdfIn PDF document text
    • https://avela.md/userfiles/file/zizinukibozezol.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/20753424737.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/7898044839.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/43555848099.pdfIn PDF document text
    • http://agilesolutions.in/uploads/62834940809.pdfIn PDF document text
    • http://wuchem.com/upload/files/luvadisebozevaxub.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/40756073357.pdfIn PDF document text
    • http://hanleyresources.com/images/gakufajojofapudunugi.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/wuvamulaboxolulikavak.pdfIn PDF document text
    • https://rcot.org/userfiles/file/86337083888.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/92635872230.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/83764543111.pdfIn PDF document text
    • http://encino.kopanramen.com/uploads/files/wetosunidinasunivawinal.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/26766128931.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b92c25a7fa---norojixujexonadiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=see+apple+emojis+on+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84C 10660 bytes
SHA-256: e06f07c703a58b2a57b8c511282707ef1b282df5591066a6edcc0091dec8ad9b
font_01_sfnt_off0000e08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89F 19396 bytes
SHA-256: 03f8e47699c9543d2eb7823925b236268b63aea8086dc9295d6d033b9477dd37

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